package com.lz.autotest.project.websocketApi.spring;



import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;

@ServerEndpoint(value = "/ws/{userId}",configurator = WebSocketConfigurator.class)
@Component
@Slf4j
public class WebSocket {

    //   与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;
    /**
     * 用户ID
     */
    private String userId;

    private String ip;


    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    //虽然@Component默认是单例模式的，但springboot还是会为每个websocket连接初始化一个bean，所以可以用一个静态set保存起来。
    //  注：底下WebSocket是当前类名
    private static CopyOnWriteArraySet<WebSocket> webSockets =new CopyOnWriteArraySet<>();
    // 用来存在线连接用户信息
    private static ConcurrentHashMap<String,Session> sessionPool = new ConcurrentHashMap<String,Session>();

    /**
     * 链接成功调用的方法
     */
    @OnOpen
    public void onOpen(Session session, @PathParam(value="userId")String userId) {
        try {
            WebSocketContainer container = ContainerProvider.getWebSocketContainer();
            ClientEndpointConfig cec = ClientEndpointConfig.Builder
                    .create().configurator(new ClientEndpointConfig.Configurator() {
                        public void beforeRequest(Map<String, List<String>> headers) {
                            //System.out.println("Setting user cookie in beforeRequest ...");

                        }
                    }).build();

            this.session = session;
            this.userId = userId;
            Map<String, Object> userProperties = this.session.getUserProperties();
            String ip = String.valueOf(userProperties.get("ip"));
            webSockets.add(this);
            sessionPool.put(ip, session);
            log.info("【websocket消息】有新的连接，总数为:"+webSockets.size());
        } catch (Exception e) {
        }
    }

    /**
     * 链接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        try {
            webSockets.remove(this);
            sessionPool.remove(this.userId);
            log.info("【websocket消息】连接断开，总数为:"+webSockets.size());
        } catch (Exception e) {
        }
    }
    /**
     * 收到客户端消息后调用的方法
     *
     * @param message
     */
    @OnMessage
    public void onMessage(String message) {
        log.info("【websocket消息】收到客户端消息:"+message);
    }

    /** 发送错误时的处理
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {

        log.error("用户错误,原因:"+error.getMessage());
        error.printStackTrace();
    }


    // 此为广播消息
    public static void sendAllMessage(String message) {
        log.info("【websocket消息】广播消息:"+message);
        for(WebSocket webSocket : webSockets) {
            try {
                if(webSocket.session.isOpen()) {
                    webSocket.session.getAsyncRemote().sendText(message);
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    // 此为单点消息
    public static void sendOneMessage(String userId, String message) {
        Session session = sessionPool.get(userId);
        synchronized (session){
            if (session != null&&session.isOpen()) {
                try {
                    log.info("【websocket消息】 单点消息:"+message);
                    session.getAsyncRemote().sendText(message);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }

    }

    // 此为单点消息(多人)
    public static void sendMoreMessage(String[] ips, String message) {
        for(String ip:ips) {
            Session session = sessionPool.get(ip);
            if (session != null&&session.isOpen()) {
                try {
                    log.info("【websocket消息】 单点消息:"+message);
                    session.getAsyncRemote().sendText(message);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }

    }

    public Session getSession() {
        return session;
    }

    public WebSocket setSession(Session session) {
        this.session = session;
        return this;
    }

    public String getUserId() {
        return userId;
    }

    public WebSocket setUserId(String userId) {
        this.userId = userId;
        return this;
    }

    public String getIp() {
        return ip;
    }

    public WebSocket setIp(String ip) {
        this.ip = ip;
        return this;
    }
}